[QCLUG] QCLUG

[David Hinkle]

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Unfortunately what actually prevents a real time anti-virus engine for =
windows from being released to the wild under the GPL is that fact that =
in order to write such an engine, a person needs Microsoft's specialized =
dev kit for interfacing with the hard drive device layer.  Such device =
drivers are called file system filters or minifilters.  This dev kit is =
only offered under terms that are very hostile to anybody releasing a =
GPL real time anti-virus engine.  I don't think anybody with the =
wherewithal to write such an engine has had the guts to test Microsoft =
in court.

What we did, was to write a standalone application called a "minifilter" =
that is loaded like a device driver.  Another standalone application =
that is a tray client and user interface.   Then I ported the clamav =
engine to windows and turned it into a service that accepts requests to =
scan over a named pipe.  The source code for the clamav port is =
available, of course, but the other two applications are proprietary.   =
I am actually going to propose to my company that we open source this =
project, but the decision is not mine alone.

Before we wrote this, we actually tried working with clamwin project =
instead.  I offered to work with them on the port and they accepted my =
offer but then they just strung me along for months without giving me =
access to their repositories.  We couldn't afford to wait for them so we =
had to develop our own, which was a very expensive and time consuming =
project, as you may imagine.

David

-----Original Message-----
From: qclug-bounces@qclug.org on behalf of Aaron Johnson
Sent: Mon 9/29/2008 7:59 AM
To: qclug@qclug.org
Subject: RE: [QCLUG] QCLUG
=20
I noticed that your appliance (CIPAFilter) uses a real-time antivirus =
client
based on the open source ClamAV engine.

Does DerbyTech contribute to the ClamWin project at all? I know one =
thing
that ClamWin has been talking about for a LONG time is developing an
on-access real-time scanning function...=20

-----Original Message-----
From: qclug-bounces@qclug.org [mailto:qclug-bounces@qclug.org] On Behalf =
Of
David Hinkle
Sent: Monday, September 29, 2008 12:46 AM
To: qclug@qclug.org
Subject: RE: [QCLUG] QCLUG

CIPAFilter uses a lot of open source for our basic functionality, such =
as
firewall, routing, NAT, etc... We use Ubunto Linux for the OS.  We do =
use
ClamAv, but not freeswan or squid. (We did use freeswan in the past). =20

However, our core features (such as the proxy, reporting, greylisting), =
are
implemented with proprietary non-gpl software we developed.  We also use
spamassassin and sendmail in conjunction with a proprietary milter we
developed for our mail features and to implement some extensions to SPF,
greylisting and some additional header analysis. =20

There's no download link, but of course our customers can request any =
GPL
software from us that we distribute with our product.  In some cases =
third
parties can also make requests from us, but you need to be in possession =
of
the binaries and request a specific software package used in the product =
by
name. (See GPLv3 6-b).

We're very careful about licensing, none of our proprietary software is
linked with GPL binaries or libraries, and as a company we focus on the
development of our proprietary software.  Linux is a platform for us, =
not an
end to itself.  It does, however, make an excellent platform.

But all that being said, we also believe in being in compliance with the
spirit of the GPL.  For example, if someone wants the source for a GPL
package I've actually modified I'll be happy to provide it via email at =
no
charge,  and I don't much care if they're a customer or not.  But you'd =
have
to tell me what package you want the source for.

David


-----Original Message-----
From: qclug-bounces@qclug.org on behalf of Dave Bergert
Sent: Sun 9/28/2008 10:41 PM
To: qclug@qclug.org
Subject: Re: [QCLUG] QCLUG
=20
Welcome, the list have been quite of late.

I was looking at CIPAFiler ..  It appears that CIPAFilter uses some =20
GPL'ed open source projects, e..g FreeSwan, ClamAV, squid.  -- do you =20
have a link to download the source of CIPAFilter ?  I'm interested in =20
learning more about it.

Regards.


On Sep 28, 2008, at 9:23 PM, David Hinkle wrote:

>
> Active? Alive?  What's your status.  I'm David Hinkle, Sr. =20
> Programmer for CIPAFilter.  CIPAFilter is a Quad Cities company that =20
> specializes in products using embedded linux.  I'm interested in =20
> becoming involved with the LUG.
>
> David
>




No virus found in this incoming message.
Checked by AVG - http://www.avg.com=20
Version: 8.0.169 / Virus Database: 270.7.4/1695 - Release Date: =
9/27/2008
1:11 PM

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